In today’s maintenance era various techniques are used for prevention of breakdown in mechanical engineering. Condition Monitoring Technique selection is a challenging job. MCDM can be useful in selecting between different methods. In this paper attempt is made to use GTMA and TOPSIS for comparing the various CM techniques. Attributes like Diagnostic Quality, Quantity of failure which can be measured, Cost, Supportability of diagnostic method and Environmental interference are used for current study. From the analysis is observed that ferrography and vibration analysis are the two most important techniques among various CM techniques.